<template>
    <div>
    <h1>count:{{ count }}</h1>
    <button @click="add">累加</button>
 
  </div>
</template>

<script>

export default {
name :" Gege",
data(){
    return {
        count : 0,
    }
},
methods : {
    add () {
        this.count++;
     this.$bus.$emit("count", this.count);
    },
 
}
}
</script>

<style>

</style>